Dual band pass filter with sharp transmission zeros for wireless applications

In this paper, a dual band microstrip bandpass filter has been proposed utilizing three edge coupled resonators, interdigital stubs and DGS technique. To enhance the coupling degree, two interdigital coupled feed lines are employed in this filter. The suppressing cell consists of stepped impedance ladder type resonators, which provides a wide stopband. The proposed suppressing cell has clear advantages like low insertion loss in the passband and suitable roll off. The frequency response of the filter looks like a standard dual band band-pass filter. The filter exhibits a dual passband with resonant frequencies at 2.2GHz and 3.45GHz covers LTE1 and LTE22 bands.

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Study of Microstrip Dual-Band Band Pass Filter

10.3233/apc210095 ◽

2021 ◽

Author(s):

Anciline V ◽

Maheswari S

Keyword(s):

Wireless Communication ◽

Insertion Loss ◽

Communication System ◽

Dual Band ◽

Band Pass Filter ◽

Pass Filter ◽

Wireless Communication System ◽

Band Pass ◽

Main Component

The main component widely used in wireless communication system is dual-band band pass filter. This band pass filter is intended in many ways and some are microstrip, waveguide, etc. The dual-band will works in two different frequency ranges which will provide a huge application. This paper compares different microstrip dual-band band pass filter based on the techniques, insertion loss, frequency, etc.

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Reconfigurable dual-mode band-pass filter with switchable bandwidth using PIN diodes

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078714000932 ◽

2014 ◽

Vol 7 (6) ◽

pp. 655-660 ◽

Cited By ~ 3

Author(s):

Photos Vryonides ◽

Symeon Nikolaou ◽

Sangkil Kim ◽

Manos M. Tentzeris

Keyword(s):

Insertion Loss ◽

Center Frequency ◽

Band Pass Filter ◽

Dual Mode ◽

Pin Diodes ◽

Pass Filter ◽

Physical Size ◽

Wireless Applications ◽

Band Pass ◽

Dc Bias

A reconfigurable band-pass filter with switchable bandwidth, for wireless applications is demonstrated using a dual-mode microstrip square-loop resonator. The proposed filter has been designed on Rogers RO4003C and achieves switchable bandwidth by changing the length of two tuning stubs with the implementation of two strategically placed p-i-n diodes as switching elements. The filter was designed with a center frequency of 2.4 GHz and the two distinct operation states have bandwidths, 113 MHz (4.8%) with an insertion loss of 1.2 dB and 35 MHz (1.5%) with an insertion loss of 1.5 dB. The physical size of the fabricated reconfigurable filter including the implementation of the DC bias lines is comparable to the size of a conventional filter.

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Miniaturized Bandpass Filter with Wide Stopband using Spiral Configuration of Stepped Impedance Resonator

Frequenz ◽

10.1515/freq-2017-0192 ◽

2018 ◽

Vol 72 (9-10) ◽

pp. 455-458 ◽

Cited By ~ 4

Author(s):

Vivek Singh ◽

Vinay Kumar Killamsetty ◽

Biswajeet Mukherjee

Keyword(s):

Bandpass Filter ◽

Short Circuit ◽

Band Pass Filter ◽

Pass Filter ◽

Transmission Zeros ◽

Quarter Wavelength ◽

Rejection Level ◽

Compact Size ◽

Band Pass ◽

Stepped Impedance Resonator

Abstract In this letter, a miniaturized Band Pass Filter (BPF) with wide stopband centered at 0.350 GHz for TETRA band applications is proposed using a Spiral Short Circuit quarter wavelength Stepped Impedance Resonator (SSC-SIR) and a stub loaded on feed line for enhancement of rejection level in the stopband. Spiral configuration of the resonator is used for the miniaturization of BPF. The proposed BPF provides a 3dB fractional bandwidth of 13.7 % with two transmission zeros in the lower and upper stopband to provide good selectivity and four transmission zeros which provide wide stopband upto 6.86f0. Proposed BPF has a very compact size of 0.064λg×0.062λg.

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